wow, no OS stated, FROM VISTA to W10, impossible post this..
why say its new, its only new to you?, its really old, or is it and ENVY?
DV6 tells the helpers zero. or is it DV6-1000 very old ?
what DV6 ?, if you read the service tag, it has long model numer
like DV6-1234us?
that tells what it is.
Virus (1) tells you nothing, we run over 20 scanners to and malwarebytes to clean it, and more, if reloading OS is too painful
the you suffer virus cleaning pain,
can take all day that.
see this list of DV6, see, it means near NOTHING.
its a notebook
and can be as old as...2009 so all are supported still, in the 10 year window of support.
the newest one is windows 8.1
example of one.
HP ENVY dv6-7300 Select Edition Notebook PC series
now Ill answer based on ZERO inputs, generic
all PC;s or notebooks
if the screen LCD has lines the LCD is bad.
if you gently twist the screen and it gets worse BINGO LCD
if not, then the LP has bad GPU. is this a 2008 Laptop
many that year had solder Ball failure on all GPUs.
if you go to bios , and press f1 (mine does to INFO PAGE)
tells you all years, there, see those years, tells you when its made.
see this one, (no ball problem here EVERY)
its 2009/10 bios and video card stamped dates.
http://pcdied.com/top-coveroff.JPG
see the read of your PC< see that VGA jack
does and external VGA desk top display fail there.
yes, GPU is bad (or the driver mangled) put back the HP driver now.
its free, on same page. as yours, at HP.com
here is a wild guess page, no pc stated so here,
see this. , go there and find yours, ITS THERE.
https://support.hp.com/us-en/drivers/selfservice/hp-envy-dv6-7300-select-edition-notebook-pc-series/5363721
That helped. Changed from 60hrz to 40. Still getting the flicker but not as bad.
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